JPH0227345Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a gas valve device with a two-shaft spark safety device that controls the opening and closing of an electromagnetic safety valve, a pilot gas passage, and a main gas passage by operating a push button. The present invention relates to a gas valve device with a flame safety device that can selectively open and close two main gas passages in a gas valve having two main gas passages, such as a bathtub with a hot water supply function.

[Conventional technology and its problems]

In this type of conventional gas valve device, the operating shaft is push-and-turn type, and a plurality of cams are fixed to the operating shaft, and each valve in the gas valve body is controlled by the action of each cam as the operating shaft rotates. A structure in which the body opens and closes is in practical use. However, this cam built-in type is an electromagnetic safety valve built into the gas valve body.
Because the timing of the operation of the pilot gas valve, main gas valve, etc. is important, a high degree of precision is required for the parts, and not only does the manufacturing and assembly require special skill and care, but it also requires disassembly and adjustment. There is a problem in that it is troublesome and costs increase.

In addition, from an operational standpoint, the solenoid valve may become detached due to the way the ignition is operated or due to vibrations during the operation, causing ignition failure. There is a problem in that it is easy to make incorrect operations.

Furthermore, in the conventional method described above, in order to determine the current usage status of the appliance, for example, whether the main burner is burning or extinguished, it is necessary to check through the viewing window installed in the appliance. Otherwise, there is the trouble of having to visually confirm the rotation angle of the operating knob and the marking symbol it points to.

[Purpose of invention]

The present invention improves the problems of the prior art as described above, and allows ignition and ignition to be carried out in a simple manner by simply pressing a push button.The present invention also has a simple structure and is easy to manufacture, assemble, and disassemble. An object of the present invention is to provide a gas valve device with a spark safety device that can clearly identify the current usage state of the device by the height position of a push button.

[Summary of the idea]

In order to achieve the above-mentioned purpose, this invention
dividing the gas valve body into a first valve casing and a second valve casing, and forming a communication port in the partition wall of both valve casings;
A first operating shaft that controls the opening and closing of the gas flow to the gas inlet and the pilot gas outlet and presses the electromagnetic safety valve is rotatably supported in the first valve casing, and
A second operating shaft having two valves for controlling the opening and closing of the gas flow to the upper main gas outlet is rotatably supported in the second valve casing, and a second operating shaft is rotatably supported below the shaft in accordance with the operation of the hydraulic responsive part. A valve is provided to open the lower main gas outlet, and first and second operating mechanisms are disposed above the first and second operating shafts, and the first and second operating mechanisms operate when a push button is pressed. A push button mechanism is adopted in which the operating shaft is held at a position slightly elevated from the lowest end, and then when the push button is pressed again from this position, the operating shaft automatically returns to the upper end position, and the push buttons of the first and second operating mechanisms are The desired opening/closing control is performed only by pressing down the button.

[Example of idea]

An embodiment of the gas valve device of the present invention will be described below with reference to FIGS. 1 to 7.

In the figure, M is a gas valve main body, which is divided into a first valve casing 1 and a second valve casing 2, and a communication port 7 is formed in the wall of both valve casings. A gas inlet 3 and a pilot gas outlet 4 communicating with the pilot burner P via a conduit are formed on the first valve housing 1 side, and a valve port 5 on the downstream side of the gas inlet 3; A valve port 6 leading to the pilot gas outlet 4 is formed. The second valve casing 2 also has an upper main gas outlet 11 and its valve port 8 which communicate with one main gas burner (a burner for a bathtub in the embodiment) S via a conduit, and the other main gas burner (in the embodiment, a burner for a bathtub). In this example, a lower main gas outlet 12 and its valve port 10 are provided which communicate with the water heater burner (U) via a conduit, and an intermediate valve port 9 is further formed between the upper and lower valve ports 8 and 10.

Reference numeral 13 designates an electromagnetic safety valve of a spark safety device, which is installed in the lower part of the first valve housing 1 and is composed of a valve body for opening and closing the valve port 5, an electromagnet, and a thermocouple T. It is placed below and on the same axis as this. The first operating shaft 14 is inserted into the first valve casing 1 from above so as to be freely raised and lowered, and an upper valve 15 and a lower valve 16 for opening and closing the valve port 6 are connected to the valve port 6 at the lower part thereof.
A buffer spring 17 is applied to the valve 15, and the upper part of the first operating shaft 14 is made to protrude above the first valve casing 1. , a restoring spring 1 is placed between the spring receiver at the upper end of the protrusion and the upper surface of the first valve casing 1.
8, the lower valve 16 closes the valve port 6 under normal conditions as shown in FIG. 2, and the restoring spring 18
When the first operating shaft 14 is pushed to the lower end against the
As shown in FIG. 3, the upper valve 15 closes the valve port 6 and opens the electromagnetic safety valve 13, and when the first operating shaft 14 is locked at a slightly upper position, the fourth
As shown in the figure, both the upper valve 15 and the lower valve 16 are constructed so that the valve port 6 can be opened.

Reference numeral 19 denotes a second operating shaft inserted into the second valve casing from above so that it can be raised and lowered, and the valve port 8 is located below the second operating shaft.
The upper valve 20 that opens and closes the upper valve 20 and the lower valve 21 that opens and closes the intermediate valve port 9 are installed with a gap between them, and the upper valve 20
A spring 22 is interposed between the upper part of the second operating shaft 19 and the lower valve 21, and the upper part of the second operating shaft 19 is made to protrude above the second valve casing 2. A restoring spring 23 is interposed between the upper surface of the body 2 and the upper valve 20 closes the valve port 8 under normal conditions, as shown in FIGS. 2 and 3, and the lower valve 21 closes the intermediate valve. The middle valve port 9 is opened at a position above the port 9, and the second operating shaft 19 is connected to the spring 2.
3, the lower valve 21 closes the intermediate valve port 9 and the upper valve 20 is separated from the valve port 8 to open the valve port 8, as shown in FIG. Reference numeral 24 denotes a drive shaft on which is fixed a valve 25 that opens and closes by means of a water pressure response unit V that operates when the hot water tap is opened, and is mounted on the same axis as the second operating shaft 19, and in normal conditions is 26 presses the valve 25 to close the valve port 10. However, when the hot water tap is opened, the drive shaft 24, which is in contact with the diaphragm of the hydraulic response part V, is pushed up against the spring 26 and closes the valve port 10. is configured to open.

Reference numeral 27 denotes a support fitting attached to the upper part of the gas valve main body M, which surrounds the protruding parts of the first operating shaft 14 and the second operating shaft 19, and has an opening hole 28 in the upper surface where both the protruding parts are located. 29, and the lower ends of the push rods 37 of the first operating mechanism 30 and the second operating mechanism 30', which will be described later, are aligned and attached to the openings 28 and 29, and the lower end surfaces of the push rods 37 and the two operating shafts are connected to each other. The upper ends of 14 and 19 are in contact with each other.

The first operating mechanism 30 and the second operating mechanism 30'
To explain in more detail, both operating mechanisms 3
0 and 30' both have the same shape and exhibit the same mechanism. That is, each case has a push button 33 at the top inside an outer cylinder case 32 having a predetermined horizontally elongated hole 31 on the side surface.
and a spring receiver 34, and a push rod 37 having a predetermined longitudinal groove 35 carved in its lower side and a heart-shaped cam groove 36 (described later) in the lower part of the longitudinal groove 35 is slidably inserted into the push rod 37. Further, the longitudinal groove 35
The upper end of the concave-shaped guide pin 38 is inserted through, and the lower end of the guide pin 38 is inserted and locked into the cam groove 36 through the horizontally elongated hole 31, and the upper end of the spring receiver 34 and the outer cylinder case 32 are inserted. A restoring spring 39 is biased between the two. The cam groove 36 has a pressing stroke slope α and a locking stroke slope β,
The locking position γ and the return guide stroke slope δ are continuously formed, and each of the stroke slopes α, β, γ,
At each interval of δ, the bottom of each groove is provided with an appropriate inclined surface (not shown) in the direction of movement so that the lower end of the guide pin 38 is restrained from moving in only one direction (counterclockwise in the embodiment). It is also stepped so that it cannot be turned in the opposite direction.

Next, the operation of the operating device according to the present invention will be specifically explained below assuming that it is installed in a bathtub with a water heater.

In the above-mentioned configuration, FIG. 2 shows the initial stopped state, in which the push rods 37 of the first operating mechanism 30 and the second operating mechanism 30' are both in a raised position. That is, each push rod 37 of both operating mechanisms 30, 30' is at the upper limit due to the bias of each restoring spring 39, and the upper end of each guide pin 38 is at the upper limit of each push rod 37.
The lower end of the vertically long groove 35 is located approximately at the center of the horizontally long hole 31, and the pressing stroke slope α of the cam groove 36
It is located at the lowest position (see Figure 7 A). 1st
The operating shaft 14 and the second operating shaft 19 are at the uppermost position due to the biasing force of restoring springs 18 and 23, respectively.
It is pressed into contact with the lower end surface of each push rod 37 of the operating mechanisms 30 and 30'. Therefore, on the first valve housing 1 side, the lower valve 16 fixed to the first operating shaft 14 closes the valve port 6, and the upper valve 15 is in the position where the valve port 6 is opened. Further, the electromagnetic safety valve 13 of the spark safety device installed in the first valve housing 1 has its valve port 5 closed. Further, the upper valve 20 attached to the second operating shaft 19 on the second valve housing 2 side closes the valve port 8, and the lower valve 21 is located away from the valve port 9, so that the valve port 9 is open. , and the valve port 10 below it is in a closed state by the valve 25 of the drive shaft 24.

In use, first, as shown in FIG. 3, the push button 33 of the first operating mechanism 30 on the first valve housing 1 side is pressed. Then, the push rod 37 is pushed down against the restoring spring 39. Through this operation, the upper end of the guide pin 38 is guided by the longitudinal groove 35 and rises to the highest position, and the lower end thereof is guided along the horizontally long hole 31 and reaches the uppermost position of the pressing stroke slope α of the cam groove 36. (See Figure 7b). At this time, push rod 37
The lower end surface presses the upper end of the first operating shaft 14 and pushes down the first operating shaft 14 against the restoring spring 18, and the lower end presses the valve body of the electromagnetic safety valve 13 against the electromagnet to open the valve opening 5. opens. At the same time, valve port 6
In place of the lower valve 16, which had been closed, the upper valve 15, which is biased by the buffer spring 17, closes the valve port 6. . In this state, gas flows into the first valve casing 1 from the gas inlet 3 as shown by the solid arrow, flows out to the pilot gas outlet 4, and is supplied to the pilot burner P leading thereto. Simultaneously with this pressing operation on the side of the first valve casing 1, an appropriate ignition means (not shown) is operated, and the gas flowing out from the pilot burner P mentioned above is ignited, starting pilot combustion. This combustion heats the thermocouple T, which excites the electromagnet of the electromagnetic safety valve 13 and attracts the valve body, and then once the pressing force of the push button 33 is released,
As shown in FIG. 4, the push rod 37 has a restoring spring 39
The upper end of the guide pin moves down along the longitudinal groove 35 due to the restoring force, and its lower end is guided by the horizontally elongated hole 31 and moves from the above-mentioned pressing stroke ramp α to the locking stroke ramp β side, reaching the lower end of this ramp. It reaches the locking position γ and is locked (see FIG. 7C). At this time, at the same time as the push rod 37 moves upward, the first operating shaft 14 also moves to the restoring spring 18.
The upper valve 15, which had closed the valve port 6, also rises and moves away from the valve port 6, and becomes open. In this state, in order to maintain the lower valve 16 in an open state without closing the valve port 6, the gas flows from the valve port 6 through the communication port 7 as shown by the solid arrow.
It flows into the valve casing 2 side.

Next, in the above-mentioned state, press the push button 33 of the second operating mechanism 30' on the second valve housing 2 side with the restoring spring 39.
When the pressure is moved against the
Due to this pressure, the upper end of the guide pin 38 of the push rod 37 is guided by the longitudinal groove 35 and rises to the uppermost position, just as in the case of the first operating mechanism 30 described above, and the lower end thereof moves along the horizontally elongated hole 31. It is guided and reaches the top of the pressing stroke slope α of the cam groove 36 (see FIG. 7B).

At this time, the lower end surface of the push rod 37 presses the upper end of the second operating shaft 24, and the second operating shaft 19 is moved by the restoring spring 2.
At the same time, the upper valve 20, which had closed the valve port 8, moves away from the valve port 8 and becomes open, and the lower valve 21 closes the intermediate valve port 9 instead. When the push button 33 is once released from the press in this state, the push rod 37 is guided by the restoring force of the restoring spring 39, and the upper end of the guide pin 38 is guided along the longitudinal groove 35 to follow the above-mentioned pressing stroke ramp. It moves from α to the side of the locking stroke slope β, reaches the locking position γ below this slope, and is locked (see FIG. 7C).
At this time, as the push rod 37 moves upward, the second operating shaft 1
9 is also moved slightly upward by the restoring spring 23, and the lower valve 21, which had closed the intermediate valve port 9, is moved by the buffer spring 2.
The valve is kept closed by the pressing force of the upper valve 2.
0 maintains the valve opening state without closing the valve port 8,
Therefore, the gas flowing into the second valve casing 2 from the communication port 7 as shown by the solid arrow flows out to the upper main gas outlet 11 side and is supplied to the bathtub burner S connected thereto. Then, the aforementioned pilot combustion flame ignites and the bathtub burner S begins to burn.

Next, if you want to stop the combustion of the bathtub burner S and instead supply gas to the water heater burner U, press the push button 33 on the second operating mechanism 30' side to the initial state. return. That is, as shown in FIG. 7D, it is only necessary to press the push button 33 and immediately release the pressing force. With this operation, the lower end of the guide pin 38 that has been locking the upward movement of the push rod 37 is guided along the horizontally long hole 31, and as soon as it reaches the upper position of the locking position γ of the cam groove 36, it continues to the next return guide stroke slope. When the second push rod 37 moves toward the δ side and the pressure is released, the second push rod 37 automatically rises along the upper end of the guide pin 38 due to the restoring force of the restoring spring 39. . Accordingly, the upper and lower ends of the guide pin 38 also descend below the longitudinal groove 35 and the return guide stroke slope δ and return to the initial position (see FIG. 7A). Simultaneously with this operation, the second operating shaft 19 is raised to its original position by the restoring force of the restoring spring 23, and the upper valve 20 closes the valve port 8.
Gas flowing to the upper main gas outlet 11 is stopped.

In this state, as shown in Fig. 1, when the hot water tap is opened and water passes through the water pressure response part V installed in the water heater waterway, the water pressure response part V is divided into the primary water chamber and the secondary water chamber, as is well known. A water pressure difference with the water chamber is created and the diaphragm is displaced toward the secondary water chamber, so this action pushes the drive shaft 24 up against the restoring spring 26.
Since the valve port 10 is in an open state, gas flows out to the lower main gas outlet 12 side and is supplied to the water heater burner U connected thereto. Then, in the same manner as described above, the pilot combustion flame ignites and the water heater burner U starts combustion.

After doing so, if you want to stop the combustion of the water heater burner U, close the hot water tap and the diaphragm will The drive shaft 24 returns to its normal position, and as a result, the drive shaft 24 is moved backward by the restoring force of the restoring spring 26, so that the valve port 10 is closed by the valve 25 to stop the flow of gas flowing out to the lower main gas outlet 12.

Furthermore, if you want to stop the combustion of the pilot burner P, press and release the push button 33 on the first operating mechanism 30 side again in the same way as in the case of the second operating mechanism 30' described above, and the first push rod 37 returns to the initial state. return. With this operation, the first operating shaft 14 also rises to its original position due to the restoring force of the restoring spring 18, and the lower valve 1
6 closes the valve port 6 to stop the gas flowing to the pilot gas outlet 4, and when the thermocouple T cools down due to the extinguishing of the pilot combustion, the electromagnet of the electromagnetic safety valve 31 is de-energized and the valve port 5 is closed. When the valve is closed, all gas inflow into the gas valve body M is blocked.

[Effect of idea]

As described above, according to the gas valve device with a safety device according to the present invention, the following effects can be obtained.

The overall configuration of the present invention is a pusher that performs a series of operations in which the first and second operating shafts are supported on the gas valve body so that they can be raised and lowered, and when the two shafts are pressed once, they lock, and when they are pressed again, they are released. Since it is equipped with a first and second operating mechanism in which rods are slidably inserted into each other, compared to the conventional internal cam rotation type,
The main components have a simple shape, do not require a particularly high level of precision, and the parts are of the same type and have a small number of parts, making production, assembly, and disassembly extremely easy, and there is no connection error between mechanisms. Productivity is high due to its flexible structure that can absorb dimensions.
It can be manufactured at low cost.

In addition, the present invention opens and closes each valve part through the first and second operating shafts only by pressing the first and second operating mechanisms, compared to the conventional cam rotation type. However, almost no vibration occurs, and therefore, the electromagnetic safety valve that is energized does not come off during operation, and the user is freed from the trouble of having to operate it again due to malfunction of the electromagnetic safety valve. Ru.

Furthermore, with this invention, the usage status of the appliance (burner combustion or extinguishing status) can be clearly identified by the height of the push button, so there is no need to check through the viewing window each time, as with the conventional cam rotating type. This eliminates the trouble of visually checking the rotation angle of the operating knob and the marking symbol it points to.

Furthermore, in the present invention, in a device having two burners connected to the upper main gas outlet and the lower main gas outlet, when gas is supplied from the lower main gas outlet, the second operating shaft is temporarily returned to its original position. Since it cannot be used without it, it can be applied to gas appliances that require selective supply of gas from the upper main gas outlet and the lower main gas outlet to prevent erroneous operation. effective.

[Brief explanation of the drawing]

Fig. 1 is a schematic system explanatory diagram illustrating an embodiment in which the operating device according to the present invention is provided in a bathtub with a water heater, and Figs. 2 to 6 are examples of implementing the operating device according to the present invention, and the operation This shows the related operations of the first operating axis and the second operating axis associated with the operation of the mechanism.
The figure is a longitudinal sectional view showing the stopped (valve closed) state, Figures 3 and 4 are longitudinal sectional views showing the electromagnetic safety valve and the pilot gas passage in the open state, and Figure 5 is the pilot gas passage and upper main gas passage. FIG. 6 is a vertical cross-sectional view showing the pilot gas passage and the lower main gas passage open.
Figure 7 shows the related operations of pressing, locking, and releasing the operating mechanism, where A shows the state when stopped, B shows the state when pressing, C shows the state when it is locked, and D shows the state just before releasing the lock. FIG. M... Gas valve body, 1... First valve casing, 2...
Second valve casing, 3... Gas inlet, 4... Pilot gas outlet, 5, 6, 8, 9, 10... Valve port, 7...
...Communication port, 11...Upper main gas outlet, 12...
Lower main gas outlet, 13...Solenoid safety valve, 14...
...First operating shaft, 15, 20...Upper valve, 16, 21
...Lower valve, 17,22...Buffer spring, 18,2
3, 26, 39...Restoration spring, 19...Second operation shaft, 24...Drive shaft, 25...Valve, 27...Support fitting, 28, 29...Opening hole, 30...First operation mechanism, 30'...second operating mechanism, 31...horizontal hole, 32...outer cylinder case, 33...push button,
34... Spring holder, 35... Longitudinal hole, 36... Cam groove, 37... Push rod, 38... Guide pin, P...
Pilot burner, S, U...Main burner, V
...Hydraulic response part.

Claims (1)

[Scope of utility model registration request] The gas valve main body is divided into a first valve casing and a second valve casing, and a communication port is formed in the partition wall of both valve casings, and a gas inlet and a pilot gas outlet are provided on the first valve casing side. and a valve port on the gas inlet side, a pilot gas outlet, and a valve port on the communication port side, and an upper main gas outlet, a lower main gas outlet, an upper main gas outlet side and a lower main gas outlet, and a gas outlet side valve port and an intermediate valve port;
A first valve in which an upper valve and a lower valve for opening and closing the pilot gas outlet and the valve port on the communication port side are installed in the valve casing.
The operating shaft is pivotably supported so that it can be raised and lowered, and the first operating shaft is biased upward by a restoring spring, and the gas inlet side valve is located below the first operating shaft and on the same axis as the first operating shaft. A second operating shaft is provided with an electromagnetic safety valve that opens and closes the opening, and an upper valve and a lower valve that selectively open and close the upper main gas outlet side valve opening and the intermediate valve opening are installed in the second valve casing. In addition to being pivoted so that it can be raised and lowered,
The second operating shaft is urged upward by a restoring spring, and below the second operating shaft, the lower main gas outlet is normally closed by the spring and opened by the action of the hydraulic response part. A valve is provided, and further,
A support fitting having holes concentric with the first operating shaft and the second operating shaft is fixed on the gas valve body, and a first operating mechanism and a second operating mechanism are mounted on each opening of the supporting fitting. and the first and second operating mechanisms are provided with push rods inserted into the respective openings and brought into contact with the upper ends of the first and second operating shafts, and the push rods are The vertical position can be controlled by a push-button mechanism that holds the button at a position slightly higher than its lowest end by pressing the button, and then automatically returns to the upper end position by pressing the button again from this position. Gas valve device with spark safety device.